Ink jet head and ink jet printer
An ink jet head includes a nozzle plate base including a plurality of nozzles. A liquid repellent film is formed on a surface of the nozzle plate base. The liquid repellent film comprises a polymeric compound formed of repeating units with a cyclic structure. A portion of the repeating units with the cyclic structure are ring-opened.
1. An ink jet head, comprising:
a nozzle plate base including a plurality of nozzles; and
a liquid repellent film on a surface of the nozzle plate base, wherein
the liquid repellent film comprises a polymeric compound formed of repeating units with a cyclic structure, and
a portion of the repeating units with the cyclic structure are ring-opened, forming a ring-opened chain having a hydroxyl group on an end thereof; and wherein
the cyclic structure is represented by the chemical formula:
2. The ink jet head according to claim 1 , wherein the repeating unit includes a fluorine atom.
3. The ink jet head according to claim 1 , wherein the cyclic structure is an aliphatic ring.
4. The ink jet head according to claim 1 , wherein the cyclic structure is heterocyclic.
5. The ink jet head according to claim 1 , wherein the cyclic structure is a 5-membered ring.
6. The ink jet head according to claim 1 , wherein the liquid repellent film is 200 nm or less in thickness.
7. The ink jet head according to claim 1 , wherein the polymeric compound is a fluororesin.
8. The ink jet head according to claim 1 , wherein the polymeric compound is an amorphous fluororesin.
9. The ink jet head according to claim 1 , wherein the polymeric compound is a random co-polymer of repeating units with the cyclic structure and repeating units with the cyclic structure ring-opened.
10. A printer, comprising:
a recording media conveyer; and
an ink jet head configured to eject an ink onto a medium conveyed by the recording media conveyer, the ink jet head comprising:
a nozzle plate base including a plurality of nozzles from which the ink is ejected; and
a liquid repellent film on a surface of the nozzle plate base, wherein
the liquid repellent film comprises a polymeric compound formed of repeating units with a cyclic structure, and
a portion of the repeating units with the cyclic structure are ring-opened, forming a ring-opened chain having a hydroxyl group on an end thereof; and wherein the cyclic structure is represented by the chemical formula:
11. The printer according to claim 10 , wherein the repeating unit includes a fluorine atom.
12. The printer according to claim 10 , wherein the cyclic structure is an aliphatic ring.
13. The printer according to claim 10 , wherein the cyclic structure is heterocyclic.
14. The printer according to claim 10 , wherein the cyclic structure is a 5-membered ring.
15. The printer according to claim 10 , wherein the liquid repellent film is 200 nm or less in thickness.
16. The printer according to claim 10 , wherein the polymeric compound is a fluororesin.
17. The printer according to claim 10 , wherein the polymeric compound is an amorphous fluororesin.
18. The printer according to claim 10 , wherein the polymeric compound is a random co-polymer of repeating units with the cyclic structure and repeating units with the cyclic structure ring-opened.